Apparatus for mechanically mounting electrodes of thermionic tubes



March 14, 1933. w DALHElMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES 0F THERMIONIC TUBES Filedon. 25,192? 10 Sheets-Sheet 1 N INVENTOR WALTHEK DALHEIMER I BY} A .udw

TTORNEY March 14, 1933. w, DALHEIMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTINGVELECTRODES OF THERMIONIC TUBES FiledOct. 25, 1927 10 Sheets-Sheet 2 INVENTOR WALTHER DALHHMER ATTQRNEY March14, 1933. w DALHElMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES OF THERMIONIG TUBES FiledOct. 23 1927 10 Sheets-Sheet 3' INVENTOR WALTHER DALHEIMER TTORNEY March14, 1933. DALHHMER 1,901,087-

APPARATUS FOR MECHANICAL-LY MOUNTING ELECTRODES-OF THERMIONIG TUBES l0Sheets-Sheet 4 Filed Oct. 26. 1927 INVENTOR WALTHER' DALHHMER A ORNEYMarch 14, 1933- w, DALHEIMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES OF THERMIONIC TUBE'SFiled Oct. 23, 1927 10 Sheets-Sheet 5 I zsa 1.58

INVENTOR WALTHER DALHEXMER TTORNEY March 14, 1933. w. DALHEIMER1,901,037

APPARATUS Fofi MECHANICALLY MOUNTING ELECTRODES OF THERMIONIC TUBESFiled Oct. '25, 1927 10 sheets-sheet s INVENTOR WALTHER DALHEMER TORNEYMarch 14, 1933. w DALHEMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES OF THERMIONIC TUBES Filed001.. 26, 1927 1Q Sheets-Sheet 7 INVENTOR WALTHER DALHHMER TTORNEY March14, 1933.

DALHEIMER APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES OF THERMIONICTUBES Filed Oct. 28

1927 10 Sheets-Sheet 8 INVENTOR WALTHER DALHHMER ELQQQW TORNEY March 14,1933. w. DALHEIMER 1,901,087

APPARATUS FOR MECHANICALLY MOUNTING ELECTRODES OF THERMIONIC TUBES FiledOct. 28, 1927 10 Sheets-Sheet 9 INVENTOR WALTHER DALHEMER B flu ATTO EYMarch 14, 1933. w. DALHElMER APPARATUS FOR MECHANICALLY MOUNTINGELECTRODES OF THERMIONIG TUBES Filed Oct. 28, 1927 10 Sheets-Sheet 1OINVENTQR WALTHER ALHHMER my 6Mw ATTORNEY Patented Mar. 14, 1933 W'ALTHERDALI-IEIMER, OF EINDHOVEN, NETHERLANDS,- ASSIG-NOR TO RADIO CORPORATIONOF AMERICA, A CORPORATION OF DELAWARE APPARATUS FOR MECHANIGALLYMOUNTING- ELECTRODES OE THERMIONIC TUBES- Application filed October 538,1927, Serial No. 228,791, and in the Netherlands August 12, 1926.

This invention relates to apparatus for mechanically mounting thevarious electrodes on the supporting and leading-in wires of the glassstems for thermionic tubes. The term stem for thermionic tubes is to beunderstood hereinafter to mean those members of discharge tubes thatserve to hold the various leading-in and supporting wires together priorto their being sealed in the bulb to form therewith a single unit. I

The apparatus according to the invention comprises mechanisms fordressing and shaping the supporting and leading-in wires. mechanisms formounting the various electrodes on the said wires and means by which theglass .stem is successively brought into operative relation to the saidmechanisms.

According to the invention an intermittently rotatin table has mountedon its carriers or chucks Ior the glass stems and the various mechanismsare so arranged as to be adapted to move into and out of the path oftravel of the said carriers. F or this purpose the mechanisms fordressing and shaping the supporting and leading-in wires are mounted onslides adapted to move radially to the rotary table.

After the supporting and leading-in wires are sealed in the stem pressand, the unfinished stem is inserted in the stem carriers or chucks ofthe machine, the leading-in and supporting wires will not be exactlynormal to the press in the majority of cases. In connect on with thefurther manipulation and 5 shaping of the said wires it is importantthat they should constantly occupy the same position relatively to themechanisms.

According to the invention a combing mechanism for dressing orpositioning the supporting and leading-wires is provided,

said mechanism comprising a toothed member or comb. There may also beprovided a h ad having two toothed jaws adapted to be closed around thesupporting and leadingin wires and to be then moved away from the chuckalong the centre line of the stem. In either case the supporting andleading-in wires will be so dressed or positioned as to be parallel toeach other whilst being normal to the press.

Generally a discharge tube comprises two leading-in wires for theincandescent cathode and one leading-in wire with a supporting wire forthe anode. In the case of a triode which in addition to the incandescentcathode and the anode comprises a grid there will also be provided asupporting and leading-in wire for the grid. For each additionalelectrode the number of wires will be further increased. For theattachment of the incandenscent cathode the leading-in wires are usuallyflattened and doubled at their ends to form hooks. The filament is thensecured to the leading-in wires by closing the hooks on'the ends of thefilament. Furthermore the outermost wires in the press shouldbe'slightly bent out so as to permit of the other electrodes, such asthe grid and the plate or anode, being mounted. To shape the said wiresthe shaping mechanism is provided which according to the inventioncomprises a bending and flattening device.

According to the invention the wires may be shaped by a sliding headprovided with jaws which are opened between the wires of the stem andwhich are so profiled that when they are in closed position they bendthe wire into the desired shape. According to the invention the end of asupporting or leading-in wire which is to be doubled, into a hook may beclamped between a fixed stop and a tongue-shaped jaw on the slidinghead, after which the end of the wire may be bent around the said tongueby the jaw.

After the supporting and leading-in wires are shaped and cut to properlengths the glass stem comes into operative relation to a device formounting the grid. According to the invention this device comprises arevolving magazine having carriers for the separate grids and soarranged that the path of travel of the carriers of the said magazine istangent to the path of travel of the carriers'or stem chucks on therotary table. By moving the revolving magazine intermittently and instep with the rotary table, a filled carrier will come into operativerelation to an unmounted stem with each step of the rotary table in itsintermittent revolution. The grid which is inserted in the magazine by Ibent by the jaws of a head around the said the operator is preferablyprovided with a supporting wire which in the operative position of themagazine can be secured to the supporting wires of the stem. -Accordingto the invention, for this purpose a welding device is arranged at thetangent point of the two paths and on the common tangent line. The saidwelding device may comprise two studs or electrodes moving along thetangent line but in opposite directions and arranged on each side of thewelding point.

The mechanism accordingto the invention for mounting the plate or anodecomprises a revolving magazine having carriers for the separatecomponent members of the said anode and so arranged that the path oftravel of its carriers is tangent to the path of travel of the carriersorchucks on the rotary table.

For the manufacture of the plate or anode cylindrical platesmay be usedas well as flat plates. 'The finished plates may then be inserted in themagazine, but the anode shap- 7 ing operation may also be deferred tothe moment when the anode is secured to the supporting and leading-inwires. If, for exl; rotary table. In casethe grid is already mounted onthe stem, the said mandrel must be provided with a central bore and alongitudinal slit. In order that the cylindrical anode may be bent eachmagazine comprises a clamping device for so holding the flat anode platethat the latter is parallel to the axis of the mandrel. When such a flatplate is moved into the operative position it is forced by a memberagainst the mandrel, and

mandrel into the shape of a cylinder, after which the plate is securedto the leading-in wires of the footstep. For this purpose a weldingdevice may be provided, said device being mounted in the common tangentlines inthe tangent point of the two paths. According to one embodimentof the invention the said device is mounted on a movable -ber is mountedso as to be reciprocable.

When a stem is in operative relation to the said filament mountingdevice, the said member moves along the axis of the grid mounted on thestem. As a rule it is preferable that of all the electrodes the filamentor cathode should be mounted last because it is usually a very thin anddelicate wire and is surrounded by the grid and the anode.

In one embodimentof theinvention the moves into the doubled ends of theleadingin wires of the stem, after which the said ends are closed on thefilament wire by clamp ing jaws thereby mounting a length of filamentwire on the leading-in wires. Subsequently the mounted filaments are cutoff on each side of the leading-in wires.

In the accompanying drawings an embodiment of the invention is shown; Inthe said drawings:

Figure 1 is aplan of an apparatus in which the glass stems travelsuccessively through various positions, the supporting and leading-inwires being thus successively properly positioned and provided withvarious electrodes.

Figures 2 and 3 show a plan and a sectional view respectively of amechanism. in which the supporting and leading-in wires are combed.

Figures 4: and 5 show a plan a sectional View respectively of amechanism that" bends the outermost supporting wires of the stem.

Figures 6 and 7 show a plan and a sectional view respectively of themechanism that cuts the supporting and leading-in wires to properlengths.

Figures 8, 9 and 10 show mechanisms in which the outermost leading-inwires c.re flattened at their ends.

Figures 11, 12 and 1% show the three projections of the carrier or chuckfor the stem.

Figures 14+ and 15 show a sectional view and a plan respectively of amechanism for doubling the flattened ends of the outermost leading-inwires.

Figure 16 shows a plan. of a mechanism in whichlthe grid is secured onthe stem.

Figure 17 shows the, glass stem after the grids attachment to thesupporting wire.

Figures 18, 19, 20, 21 and 22 show the mechanism in which theplate-shaped anode is secured to the stem.

' Figures 23, 2a and 25 show a mechanism by which the filament isattached to the leading-in wires.

' Before entering into the details of the various component members theoperation of the apparatus will'be briefly set forth. A frame 1 hasmounted on it, in addition to a rotary table 2, a number of mechanismswith which the stem is successively brought i to operative relation. Forthis purpose the rotary table 2 has in its rim radial holes or pocketseach of which holds a stud 80 (Figure to which the carrier or chuck forthe stem is secured. The rotary table is fast on a vertical shaft 3 andis rotated step by step and intermittently b a gear wheel 5 whichengages a gear wheel fast on the shaft 3. v

The apparatus herein described serves to mount on a ste a for athermionic tube the various electrodes, such as a grid, the plate oranode and the filamentary cathode. For this purpose the stem is placedby hand at position (Figure 1) in one of the carriers or stem chucks onthe rotary table. By reason of the intermittent or step by step motionof the table 2 the stem carrier will successively occupy the positionsA, B, C, D, E, F, G, H and the glass stem is successively sul'ijected tovarious operations as follows: In position A. the supportingandleading-in wires of the stem are combed and placed par allel, inposition'B the two outermost leading in wires (the wires 0, Figures 5and 12) are bent, in position C the supporting and leading-in wires arecut to proper lengths, in position I) leading-in wires 0 are flattenedat their extrem ends, in position E these ends are doubled or bent intohooks, in position F the grid is secured to the wires 6 (Figures 12 and17), in position G the plate-shaped anode is attached to the wires a andfinally in position H the filamentary cathode is secured as a wire tothe two outermostleading-in wires. Each of the said mechanisms will bemore fully described hereinafter.

The combing operation. (Fz'gwres Q and 3) it a housing 86 which servesto support the irojecting ends of the supporting and leading-in wires ofthe stemvheld in the chuck.

The mechanism A. which is shown in Figures 2 and 3 is operated by achain wheel 9 fast on a shaft 11 which is journalled in the frame 1. Inaddition to the chain wheel 9 the said shaft has secured to it a chainwheel 10 and cams 12, 13 and 17. The shaft is rotated by the chain wheel9 and a chain 8 and transmits this rotation via the chain wheel 10 and achain '2' to the various chain wheels for the various mechanisms.(Figure 1). On rotation of the shaft 11 the cam 12 engages a roller llon a spindle 15 mountcd in slide 16. The slide 16 is adapted to slideby means of sleeves 21 on rods 19 and 20 rigidly mounted in bosses 30.As a result of this mechanism the rotation of the shaft 11 causes theslide 16 to be reciprocated. For this purpose the slide has secured toit a spring 36 which ensures that the roller 14 is in continuousengagement with the cam 12.

In addition the slide 16 has pivoted to it by means of fixed pins 22 and23 two arms 2a and 25 provided'with rollers 27' and 28 which are forcedby a spring 26 against the cams 13 and 17 respectively. Combing jawssecured to the ends of the arms 25 and 24,

have a number of slits to receive. the leading in wires of the glassstem when the said arms are 1n closed position. The arms have on themstuds 35, 34 which in the extreme closed 11, the slide 16will moveforwardly and the cams'13 and'17 will consequently be caused to occupysuch a position that the combing jaws of the arms 2% and 25 close uponthe supporting and leading-in wires of the glass stem. In order topermit of the slide 16 being reciprocated a. slot 3? is provided for theshaft 11. hen the supporting and loading 7 in wires are enclosed by thejaws 40, the mechanism occupies the position shown in Figure 2. On theshaft 11 continuing its rotation the cam 12 will force away the roller14- so that the slide with the arms 2% and 25 will be moved away fromthe stem thereby combing out and straightening the wires of the stem.This movement will cause the roller 27 and 28 to ride off the cams 13and 17 so that the arms 25 and 24% will tend to come together and thusinjure the supporting and leading-in wires of the glass stem but thestuds 34- and 35 mounted on the arms 24- and 25 encounter the stop 31,and any further closing movement of the combing jaws is prevented.v Whenthe arms fallback to their rearmost position they are opened againwhereupon the stem is released and moves to the next position.

Shaping the outermost leading-in wires of the glass stem (Figures 4 and5) The wire shaping mechanism B which serves to shape the outermostleading-in wires to leave room for attachment of the grid and theplate-shaped anode to the wires destined for them respectively isoperated by a chain wheel which is continuously rotated by a chain 7(Figure 1). The chain wheel 50 is fast on a shaft 51 which is journalledin the frame 1, and which is provided with a cam 52 that reciprocates aroller 53 secured to a slide 55 against the action of a spring 61. Theslide 55 by means of sleeves 56 slides on rods 57 which are rigidlyconnected by means of bosses 58 and 59 to a l1011S- ing 60 secured tothe frame 1. In addit1on the slide 55 is provided with fixed stops 67and 68 and with a housing 62v to which are pivoted levers 63 and 64 inpoints 78 and 79.

Said leversare provided with jaws 65 and 66 which during the slidesforward motion slide between thewires of the stem. During their forwardmovement they engage stops 72 and 73 rigidly secured to the bss'58, andthus the levers are rocked so that they force the wires 0 of the glassstem outwardly against the stops 6? and 68. The slide then movesbackwards, whereupon the levers er the slide has come into its mostretracted 108 against the cam 102.

position the glass stemtravels to position G.

Cutting the supporting and leading-in wires of'the glass stem. (Figures6 and The wire trimming mechanism C is operated by a chain wheel 100which. is continuously rotated by the chain'7 similarly to the othermechanisms. The chain Wheel 100 is fast on. a shaft 101 mounted in theframe 1 and driveson a cam 102 mounted on the said shaft A roller 103 ona spindle .104; mounted in a slide 105 is forced by a spring The slide105 is adapted by means of sleeves 106 toslide on rods 107 rigidlymounted in bosses 109 secured to a housing 117. In addition the slide105 is provided with a pivot 110 on which heads 113 and 1151 are adaptedto revolve by means of sleeves 111 and 112. The said heads are providedwith jaws 130 and 131 to which cutters 115 can be fixed by means ofbolts 116. In addition the heads are provided with rollers 118 and 119which ride on a cam 121 mounted on a shaft 122. This shaft which isjournalled in brackets 123 and 124 has; in addition, secured to it alever 125 which in a manner not shown can be actuated periodically, therollers 118 and 119 being thus moved against the action of a spring 120which will result in jaws 130 and 131 being opened and closed.Bymounting the cutters 115 at the proper height, the supporting andleading-in Wires may be cut to proper lengths. This cutting will be donein the most advanced position of the slide 105 (Figures 6 and 7 and itsmost retracted position will leave sutficient room for the stem to moveto the next position D.

Flatteuing the trimmed leading-in wires of the stem. (Figures 8, .9 and10).

The wire flattening mechanislnD is operated by a chain wheel 150 whichis continuously rotated by the chain 7 Fig. 1). Said chain wheel is faston a shaft 151 journalled in thetable 1 and drives a cam 152. A roller143 one spindle 154: on a slide 156 follows the movement of the said camagainst the action of a spring 159. The slide 156 is adapted by means ofsleeves 155 to slide on rods 157 which in their turn are rigidly securedto bosses 158. As shown in Figure 10 the .slide 156 comprises a basehaving a bearing fiatten only the outermost leading-in wires of theglass stem. After the flattening operation the slide 156 is retracted bythe cam 152 and the glassstem can travel to the next position E.

Bending the flattened outermost leading-in (Figures 1!; and 15) The hookbending mechanism E is operated by a chain wheel 200 which is rotated bythe chain 7 and which is fast on a shaft 201 journalled in the table andhaving secured to it a gear wheel 231 and cams 202 and 215. A roller 203which by means of a spindle 204 is secured to a slide 205 follows themovements of the cam 202 against the action of a spring 235. The slide205 is adapted by means of sleeves 206 to slide on rods 207, which aresecured in bosses 208 on a housing 209. The slide 205 has fixed to it astop 210 and in addition it has a lever 211 pivoted to it by means of apin 242. The lever 211 is provided with a tongue shaped end and isoperated by a lever 213 which by means of a roller 2141 rides on the cam215. By reason of the rotation of the said cam the lever 213 is movedagainst the action of a spring 24.3 and the tongue shaped end of thelever 211 will thus move toward and away from the stop 210. In additionthe slide 205 has mounted wires into hooks.

.80 structed that on approaching each other they I on it a lever 220which swings on a stud 221 and is provided with a roller 223 that rideson a cam 224. This cam is fast on a shaft 225 which is journalled inbrackets 226 and 229 and is rotated by a pinion 230 engaging a gearwheel 231. The lever 220 has pivoted to it by means of a stud 219 amember 212 provided with a sliding surface 217 and with a lug 218. It isforced by a spring 222 against a lug 216 of the stop 210. The mechaofthe shaft 225. The member 212 willconsequently occupy its most retractedposltlon in which its sliding surface 217 is forced by 1 end of theleading-in wire 0 is doubled around the tongue shaped endof the lever211 whereupon the member 212 first returns and then the tongue shapedend of the lever 211 Will move out of the hook-shaped end of the hook a,whereupon the slide 205 moves into its rearmost position so as to permitthe glass to move to the next position F.

Mounting the grid. (Figures 16 and 17) grid 256 is provided with asupporting Wire 25? which at both ends is benttwice at right angles,said ends being attached to the wires 6 of the stem. The rid with the Su3 ortin i e l P 3 wires is so insertedin the carriers 255 that in theoperative position of the magazine the ends of the supporting wire 25'?are precisely in proper relation to the supporting wiresZ). In thisposition attachment can be effected by a welding device which comprises.veld electrodes 263 and 264 resiliently mounts trodes can be connectedto an electric circuit leads 269 and 270. The brackets 265 and 266 aremounted on levers 267 and 268 adapted to be actuated by a cam 271(Figure 1) fast on a shaft 272 which is rotated by means of a chainwheel 273 and the chain 7 In addition a bell crank 260 (Figure 16) isprovided which is pivoted to a member 261 .nounted in the frame 1, andwhich is actuated in a manner not shown. This bell crank is mounted thatduring its movement it engages a roller 259, mounted on the jaw 258 whenthe latter is in the operative position. This movement, which takesplace after the sun rtin wire of the grid is welded to the vf be, willresult in the jaw being moved outwardly to such an extent as to allowfor the movement of the glass stem with the grid mounted on it to thenext position G.

d on brackets 265 and 266. The elec- Mountz'ng the plate anode.

' 20, 21 and 22) The plate mounting mechanism G isprovided with arotatable magazine 307 which (Figures 18, 1.9,

has secured to it carriers 308' having movable members 309, 312 and 31319) which are so shaped as to be adapted to'clamp a flat anode plate.This plate which is to bebent cylindri'cally, is at its two ends doubledat right angles so as to be secured by means of these parts to the wiresa of theglass stem. For thispurpose the members 312 and 313 are providedwith studs 310 and 311 which are milled to have an edge the arrangementbeing such that the flat anode plate is exactly clamped between the saidtwo studs and the member 309.

In the operativeposition of therotatable magazine 307 relatively to therotary table 7 2; is a vertically moving hollow mandrel 314' which isguided by a sleeve mounted on the frame 1 and which is fixed to alever320 pivoted in 327 to a housing 325 secured to the frame 1. Thesaid lever has a roller riding on a rotarycam 302 which is keyed to asleeve 1 301. This sleeve which is adapted to revolve on a shaft 303 isactuated by a chain wheel 300 operated by the chain 7 (Figure 1). Inaddition thesleeve 301 (Figure 18) has secured to it a cam 302 on whichrides the roller of a bell crank 322.- This bell crank which is pivotedin 326 to the housing 325 moves against the action of a spring 323 andits'end 318 bears on a plate 328 in WlllCll studs 330 and331are rigidlymounted. The studs 331 are directly connected to the members movementwill be continued until the plateshaped anode engages the mandrel 314after which the said plate is bent around the mandrel by the hollowmember 309 (Figure 20).

Any further movement of the member 309 is opposed by the mandrel and thespring 329 is compressed while the members 312 and 313 7 proceed. Byreason of this movement they are carried out of engagement with theplate to suchan extent that when thelatter is being completelybent-around the mandrel they will not be in its way. a j 1 The bendingoperation is efiected by jaws 350 and 351 pivoted on a spindle 341 whichis mounted on a slide 340 adapted by means of" sleeves 343 to slide onrods 342 rigidly attachcd to the frame 1. The jaws 350 and 351 form partof heads 344 and 345 which are provided. with rollers 346 and 347 andwhich are pulled towards each other by means of a spring 338. Thus therollers 346 and 347 are forced against a stationary cam 348 which issecuredto a column 349 fixed to the frame 1. The slide 340 has incontact with it a bell crank 355 which is pivoted in 356 to the housing325 and which is provided at its other end with a roller 358 riding onthe cam 302. By reason of the movement of the bell rank the slide 340slides backwards and forwards, the spring 357 keeping the slide incontact with the end of lever 355.

When the plate-shaped anode is bent as shown in Figure 20 the slide 340is moved owardsthe left.- By'reason of this motion the rollers 346 and347 ride on the cam 348 which ensures that the jaws 350 and 351 slidearound the mandrel 314 and guide the plate in such a manner that ittakes a complete cylindrical shape and its doubled end iscaused to bearon the wires a of the glass stem. In this position are provided weldingpins 371 and372 which by means of brackets 373 and 374 are secured tothe lever 377 and which are actuated by means of auguide 375 and 376'andlevers 380 and 381. The lever 381 is operated by a rod 385 (Figure 1)and imparts its movernent to the lever 380 by means of levers 382 and383 coupled in 384.

The other end of the bell crank has a roller which rides on a cam 388which is operated by a chain wheel 389 actuated by the chain 7.

' The rotatable magazine is rotated intermittently by means of gear.wheels 390, 391 and In summary the operation of the mechanism G is asfollows:

When the glass stem has come operative position, the hollow mandrel 314rises around the grid that has already been secured tothe glass stem,after which the anode plate is bent around the said mandrel into acylindrical shape by the members 309, 213 and 313 and the jaws 350, 351and has its doubled end properly positioned relatively to the wires a.Then the lever 377 with the welding device is moved into the operativeposition, whereupon the welding pins 371 and 72 are moved inwardly andthe anode plate is welded to the wires a of the glass stem. Then themandrel 314 is lowered and the Welding device is raised, the arrangementbeing such as to permit the glass stem to move to the position H.

into the Mounting the filament.

Fem; 23, a4 and 25),

- The filament mounting mechanism H is i 420. On the frame 1 is mounteda pedestal 406 to which is pivoted a lever 408. This lever 408 issecured in 407 to a rod which is guided through the frame 1 and has aroller 410 riding on the cam 403. The lever 408 is thus moved againstthe action of a spring 409, said movement being transmitted by a fork405 on the end of lever 408 andby a stud 411 to a slide 412. This slideis guided by a sleeve provided on a pedestal 417 and has in addition anopening through which a wire 414 can be passed. This wire 414 is woundon a bobbin 415 which is secured to the pedestal 417. By referring toFigure 25 the mechanism of the slide 412 will be better understood. Asshown in said figure the stud 411 is pivoted in' 433 to the slide 412.In addition it has two extensions 431 and 432. By means of a spring 430secured to the stud 411 the latter tends to cause the projection 432 tobear on the slide 412. As the fork 405 of the lever 408 is moved to theright the extension 431 will be forced against the slide 412 and thussteady the Wire 414. The slide 412 has connectedto it a needle 413 whichguidesthe wire 414 during the descending movement through the grid.After the needle 413 is lowered the protruding part of the wire 414 isgripped by a clip 419 (Figure 23) which is pivoted to the frame 1 andwhich is actuated by means of the cam 420 and a roller 416. The jaw ofthis clip is provided I with a felt pad and when in closed position itclamps against a stationary stop 440 so as. to grip the wire 414. Duringthe ascending motion of the slide 412 the wire 414 is positioned betweenthe hookshaped flattened ends of the-supporting wires of the stem. Inorder that these hookshaped ends may be closed, heads 421 and 422 havingclamping jaws 423 and 424 are provided which are actuated by a cam 425.By means of a shaft 426 this cam is rotated by a pinion 427 whichengages the gear wheel 402. The jaws 423 and 424 have flat surfaces attheir opposite ends on which cutters 435 and 436 are adapted to slide soas to sever the filament wire 414 after its attachment to the leading-inwires. The cutters 435 and 436 are secured to a lever 418 which ispivoted in 437 andhas a roller riding on the cam disc 404.

After the filament wire is severed the grip of the jaws 423 and 424 isreleased, said jaws falling then back out of engagement with the glassstem so as to allow for its movement to the next position. Thisis'position 0 where the operator withdraws the finished mount fromv thecarrier and replaces it by a new stem which is submitted to the sameseries of operations as hereinbefore described.

What I claim is:

1. A device of the character described, comprising a stationary frame, arotatable table mounted on said frame, a chuck for holding a glass stemat the periphery of said rotatable able, and a plurality of mechanismsadjacent the periphery of said table for mounting electrodes on theglass stems in said chuck, the said mechanisms being mounted to moveradially of said table, and common actuating :neans for moving saidtable step by step to bring said chuck into registry with saidmechanisms in succession and to move said mechanisms in succession.radially of said table to bring them into and out of the path f thetraveling stem.

2. A device of the character described, comprising a stationary frame,means for revolving a glass stem, and aplurality of mechanisms formounting electrodes onthe stem, raid mechanisms being arranged toperiodically move in a radial direction with respect to the travellingstem.

3. A device of the character described, comprising a stationary frame,means on aid frame for revolving a glass stem, means for combing thesupporting and leading-in wires on the glass stem and means for shapingthe outermost leading-in wires on the glass stem,

i. A device of the character described, comprising a stationary frame,means for revolving a glass stem with leading-in wires projectingradially of its path, means for shaping the outermost leading-in wireson he glass stem, and a hook forming mechanism comprising cooperatingjaws for bending into hooks the ends of a plurality of said leading-inwires, said mechanism being mounted to reciprocate bodily and radiallyof said path to bring-said jaws into and out of the proper relation tosaid ends of leading- 1n wires.

5. A device of the character described, comprising a shaft, a cam onsaid shaft, a slide '0 be actuated by said cam to move perpendicularlyto the axis of said shaft, and means to be actuated by said slide forperiodically combing the supporting and leading-in wires on a glassstem. 7

6. A device of the character described, comprising a vertical shaft, ahorizontal slide to be reciprocated by said shaft, arms pivoted on saidslide, teeth mounted at the ends of said arms, means to be actuated bysaid shaft For presenting a glass stem containing sup-, porting andleading-in wires to the said teeth, and means to be actuated by saidshaft for rotating the arms about their pivots and for reciprocating theslide to comb the Wires.

7. A device of the character described, comprisingfa verticalsh'aft,-ahorizontal slide to be reci rocated b said shaft arms lvoted v I 7 onsald slide, teeth mounted at the ends of said arms, means to be actuatedby sa d shaft for presenting a glass stem containing supporting andlead1ng-1n wires to the said teeth, and means for rotating the armsabout their pivots and for reciprocating the slide to comb the WlIGSthemeans for rota-tin the arms a b s and reciprocating the slide beingactuated from the same source as and in timed rela- 0 a I i c tion withthe means for resentin the stem. 7 a 8. A device of the characterdescribed com- I I n I I c prising a nxed aw, a movable aw-plvoted tothe fixed aw, a sprlng holding the movable jaw in clampedrelation to thefixed m,

and a housing on said fixed jaw projecting from said jaw with itsendspaced away from the end of said aw and in substantial alignment withthe longitudinal axlsof said' aws in position to support wiresprojecting from a stem held in said jaws.

9. A device of the character described, com-.

prising a stationary frame, a. shaft perpendlcular to said frame, atable mounted perpendicular to; said shaft andadapted to be rotatedthereby, and means on said rotat-' means secured to the fixed jaw forsupporting the wires on the glass stem.

10. A device of the character described, comprising a stationary frame,a shaft perpendicular to said frame, a table mounted perpendicular tosaid shaft and adapted to be rotated thereby, and means on saidrotatable table for carrying a'glass stem, said means comprising a awfixed relative to the rotating table, a movable jaw pivoted to the fixedjaw, a spring holding the movable jaw in clamped relation to thefixedjaw, and means secured to the fixed jaw for supporting the wires on theglass stem, the stem carrying means holding the wires on the stem in aplane perpendicular to the surface of the rotating table.

11. A device of the character described, comprising a stationaryframe,'a rotatable table mounted on said frame, means on said table forholding a glass stem so that the device comprising a slide reciprocatingtoward and away from said glass stem, arms pivoted on said reciprocatingslide, cutters mounted at the ends of sald arms, and means to'actuatethe reciprocating slide and the arms to cause the latter toclose thecutters onthe' comprising a stationary frame, means for 1'5 ncluding areciprocatable punch.

dixedto the slide, a second shaft parallel to revolving a glass stem,means on the frame for combing the wires on the stem, means on the framefor shaping the wires, means on the frame forsevering the wires, andmeans on the frame for flattening the ends of the severed wires, saidflattening means comprising a reciprocating slide, a movable punch,

14. A device of the character described, comprisin means to support aglass stem, a shaft, a slide perpendicular to the axis of the shaft tobe reciprocated thereby, a punch the first shaft, an eccentric on thesecond shaft, and a second punch actuated by said eccentric to approachthe fixed punch and thereby flatten the ends of the wires on the stem.

15. A device of the character described, comprising a stationary frame,means for revolving a glass stem, and means for doubling a plurality ofleading-in wires on the glass stem, said doubling means having a lever'about which the wires are bent and a pivoted member adapted to bend thewires. 7 16. Means for doubling a wire on itself, comprising means forsupporting the wire, rotating shaft, a slide perpendicular to the axisof the shaft and adapted to be reciprocated thereby, a lever pivoted onsaid slide to act as an anvil during the bending operation, a secondlever pivoted to the slide and having at one end thereof a bending arm,and .neans for reciprocating the slide and actuating the levers wire.

17. A device of the character described, comprising means to support aglass stem, Rneans for combing the wires on the stem, means for shapingthe wires, means for severing the wires, means for flattening the endsof the wires, and means for doubling the wires on themselves, saiddoubling means -comprising a pivoted anvil and a pivoted bending member.7

18. Means for mounting and welding a grid to its supporting wires,comprising means for supporting a glass stem containing the Lupportingwires, a rotatable magazine,

V'meanson said magazine for carrying a grid, welding means adapted tomove tangentially to the path of the rim of the rotatable magazine, andmeans for rotating the magazine -lnto position to bring the grid intoproper relation'to the supporting wires and for moving the weldingmeansinto position to weld the grid to its supporting wires.

7 19. A device of the character described,"

comprising a vertical rotatable shaft, means on the slide for bendingthe clamping a plate fiat throughout its major portion and bent at rightangles at two of its ends, a vertically movable cylindrical mandrelactuated by said shaft, means to bend the plate about the mandrel toforma butt-ended cylinder, and means to weld the anode cylinder to itssupporting wires on the glass stem.

20. Means to shape electrodes, comprising arotatable carrier adapted tohold the raw material to be shaped, a mandrel adapted to move in adirection perpendicular to the path of the rotating carrier, meansadapted to bend the raw material'partly around the mandrel, a pluralityof awe adapted to surround the mandrel on the far side to complete'thebending operation, and means to weld the formed electrode to asupporting member. 7 1

21;A device of the character described, comprising means for holding aglass stem, means for holding a supply of filament wire, reciprocatingmeans for withdrawing the filament wire from its holding means, aholmovement, meansfor withdrawing the needle, and means, for fasteningthe filament wire to 1ts supporting wlres on the stem and for severingthe proper length of filament wire.

22. A device of the. character described, comprising a vertical shaft, ahorizontal sta tionary frame mounted perpendicular to said shaft, meansfor supporting a roll of filil':

ment Wire on said frame, a vertically recipro catable lever adapted tofeed the filament 7 wire from its supporting member, a verticallymovable hollow needle adapted to receive said filament w1re, means forholding a glass footstep in position underneath the hollow? needle,means for moving saidhollow needle downwardly into position, means forclamping the working end of the filament wire 7 against upward movement,means for wlthdrawing the needle upwardly, means for fastening thefilament wire to its supporting Wires onthe glass footstep, and meansfor severing the proper length of filament wire.

23. A device of the character described comprising a chuck for holding aglass stem with projecting wires, means for combing said projectingwires on the glass stem compris ng a pair of co-operatuig tooth-ed awsmounted to move bodily away from said 7 chuck in a direction lengthwiseof the projecting wires of the glass stem, and actuating f mechanism forclosing said jaws adjacent said chuck and moving said aws while closecbodlly away from said chuck.

7 grooved combing jaws mounted adjacent said path to close about theprojecting wires on a stem in said chuck and to movebodily away fromsaid chuck in a path radial to the circular path of the glass stem, andcommon actuating means for moving said chuck along its path intoregistry with said combing means and simultaneously closing said combingjaws and moving said jaws bodily away from said chuck.

25. In a mount making machine, the combination of a stem'chuck and anelectrode chuck mounted to travel along curved paths and register witheach other at a pre-determined point, said chucks being mounted to holdan electrode and a stem with lead wires projecting from said stem chuckin position to cause said electrode to engage said stem lead wires whensaid chucks register with each other, a fastening device mounted at saidpoint adjacent said paths to fasten said electrode to said stem leadwires, and common actuating means for moving said chucks into registryand actuatingsaid fastening device to fasten said stem lead wires tosaid electrode.

26. In a mount making machine, the combination of two rotatable carriersmounted adjacent each otherto rotate about different axes, a stem chuckmounted on one of said carriers to hold a stem with lead wiresprojecting radially from said chuck, anelectrode chuck mounted on theother carrier to hold an electrode with a portion thereof projectinginto the path of the lead wires on a stem in said stem chuck at apre-determined point in its travel, a welding device mounted at saidpoint and comprising welding elec-' trodes movable into and out of thepath of the ends of the lead wires of a stem in said stem chuck, andcommon actuating means for moving said carrier step by step to bringsaid chucks adjacent each other at said point and thereby bring the endsof said lead wires and the projecting portion of said electrode intoengagement, actuating said welding electrodes to advance them intocontact with said lead wires and said electrode and then withdraw them,and opening said electrode chuck.

27. In a mount making machine, the combination of a stem chuck and agrid chuck mounted to travel along curved paths into registry with eachother at a pre-determined point, said chucks being mounted to hold astem and a grid with lead wires projecting from said chucks in positionto overlap when said chucks are in registry, a fastening device mountedat said point adjacent said paths to join said overlapping stem and gridlead wires, and common actuating means for moving said chucks intoregistry, maintaining said overlapped "wires relatively immovable, andactuating said fastening device while said wires-are overlapped. V

28'. In a mount making machine, the combination of a stem ehuckmountedtotravel along a pre-determined path, said chuck beingmounted to hold astem with lead wires projecting fromfsaid chuck, a grid-chuck mounted totravel along a path which at a pie-determined point is adjacent the.path of said stem chuck, said grid chuck comprising cooperating jaws forholding grid leads with their ends projecting into the path of said stemleads at said point, whereby said grid leads and said stem leads overlapat said point, a wire welding device at said point adjacent said pathsand comprising a pair of cooperating welding electrodes mounted to 'movetangentiallyof the path of said stem chuck to close upon a pair of saidover lapping leads,and common actuating means for moving said'chucks tobring them adjacent'each other and thereby overlap said grid and stemleads,and for actuating said welding electrodes whilesaid'leads areoverlapped whereby said grid'is welded to said stem leads. i a.

' 29. In a mount making machine, the combination of a stemchuck mountedto travel along'the pre-determine'd path and tohold a stem with lead.wires projecting from said chuck, of an electrode shaping-mechanismmounted adjacent the path of said stem chuck and comprising aholder'for. engaging an electrode near its extremities, a mandrelmovable into registry with said chuck and to ad join the electrode insaid holder, bending aws movable transverselyof said mandrel to bend theelectrode in said holder around said mandrel until its extremities arein contact with the lead wires of a stem in said chuck, and drivingmeans for actuating said mandrel and said bending jaws insequenc'e, afastening device mounted adjacent said point to fasten said lead trode,and common actuating means for bringing said chuck into registry withsaid electrode shaping mechanism, actuating the dr ving means of saidmechanism, and actu ating said fastening device. 30. In a mount makingmachine, the combination of astemchuck'mounted to travel along thepre-determined path and to hold a stem with lead wires projecting fromsaid chuck, of an electrode shaping mechanism mounted adjacent the pathof said stem chuck and comprising a fork for holding a fiat plate by theedges, a slotted mandrel mounted adjacent said fork to move lengthwiseof said fork into position over the end of a stem in said chuck with thelead wires of said stem in the slot in said mandrel, a reciprocatingdie.

wires to said elecmovable transversely of said fork to bend the plate insaid fork around said mandrel, bending jaws pivoted adjacent said forkto further bendsaid plate to bring its edges around said mandrel intocontact with said lead wires, and driving means for actuating saidmandrel, said die, and said bending jaws in sequence, a fastening-devicemounted adjacent said point to fasten said lead wires to said electrode,and common actuating means for bringing said chuck into registry withsaid electrode shaping mechanism, actuating the driving means of saidmechanism, and

actuating said fastening device.

" 31; In a mount making machine, the com.-

bination with a stem chuck mounted to travel along a pre-determined pathand to hold a stem with lead wires projecting from said chuck, afilament mounting mechanism mounted adjacent the path :of said chuck andcomprising a reciprocating filament feeder movable in alignment with twoof the lead wires of a stem in said chuck, filamentfastening meansforsecuring a filament to said lead wires, and common actuating means formoving said chuck into registry with said filament mounting mechanismand then actuating said filament feeder and said filament fasteningmeans.

32. In a mount making machineflthe combination with a stem chuck mountedto travel along a predetermined path and to hold a stem with leadwiresprojecting from said. chuck, .a filament mounting mechanism f mountedadjacent the path of said chuck and comprising a reciprocting filamentfeeder movable in alignment with two'of the lead wires of a stem in saidchuck, filament fastening means for securing the filament to said leadwires, a cutter mounted adjacent said filament feeder to-cut thefilament .wire ad joining one of thelead-wires, and common actuatingmeans for moving said chuck into registry with said filament mountingmecha- -v nism and then actuating said filament feeder,

said filamentfastening means, and said outter. a

33. ,A device of thecharacterdescribed comprising a stationary frame, arotatable table on said frame, a chuckon the periphery of said tablehaving two cooperatingrelativelytmovable jaws for holding a glass stemhaving wires projecting fromvit, means for holding said jaws closed tohold the stem .55 with said wires projecting from said chuck,

and a housing adjacent said chuck in position to support the projectingwires of the glass stem in said chuck. WALTHER DALHEIMER.

